We've all taken a dodgy cab in our time. One guy asked me to give him a back-rub in exchange for letting me off the fare. I was like, "here's the cash mate." Another chappy claimed to be Paddy Patel - a child actor from UK TV series Tuckers Luck - he drove like a speed freak and regaled me with stories that "playing a black Irish boy. England wasn't ready for it." So go on - tell us your worst and we'll tell the world.

[edit: for those confused by the term mini-cab, London has two sorts of taxis: highly regulated, licensed and salt-of-the-earth black cabs that you see in films and a whole bunch of unlicensed, uninsured, random cars driven by nutters who aren't supposed to pick up from the street (you have to phone for them). They are universally rubbish]